Design and Validation of a Novel High Sensitivity Self-Temperature Compensated Fiber Bragg Grating Accelerometer

Parida, Om Prakash and Nayak, Jagannath and Asokan, Sundarrajan (2019) Design and Validation of a Novel High Sensitivity Self-Temperature Compensated Fiber Bragg Grating Accelerometer. In: IEEE SENSORS JOURNAL, 19 (15). pp. 6197-6204.

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Abstract

Fiber Bragg Grating-based accelerometers are being used in structural health monitoring as they offer several advantages over their electrical counterparts. In this paper, the concept of a novel T-shaped cantilever-based mechanical sensor head is proposed on which the two Fiber Bragg Gratings are integrated in a differential sensing configuration to realize an optical accelerometer. This elegant design simultaneously achieves the dual goals of sensitivity enhancement, and self-temperature compensation. A mathematical model of the accelerometer is developed, and numerical simulations are carried out for three mechanical sensor head designs. A prototype is fabricated and characterized to prove the design. The sensitivity of 821 pm/g of is achieved with a linearity of 99.7%, cross-axis sensitivity of 0.3%, and natural frequency of 64 Hz; self-temperature compensation is achieved with an error of 0.07 pm/degrees C.

Item Type:	Journal Article
Publication:	IEEE SENSORS JOURNAL
Publisher:	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Additional Information:	copyright for this article belongs to IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords:	Fiber Bragg grating (FBG) accelerometer; mechanical sensor head (MSH); self-temperature compensation; structural health monitoring (SHM)
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	20 Aug 2019 06:06
Last Modified:	20 Aug 2019 06:06
URI:	http://eprints.iisc.ac.in/id/eprint/63290

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